Mac OS makes use of the BSD code base and the XNU kernel, and its core set of components is based upon Apple’s open source Darwin operating system. It is a Unix-based operating system built on NeXTSTEP and other technology developed at NeXT from the late 1980s until early 1997, when Apple purchased the company and its CEO Steve Jobs returned to Apple.Precursors to the original release of Mac OS X include OpenStep, Apple’s Rhapsody project, and the Mac OS X Public Beta. MacOS (originally named “Mac OS X” until 2012 and then “OS X” until 2016) is the current Mac operating system that officially succeeded the classic Mac OS in 2001.Īlthough the system was originally marketed as simply “version 10” of Mac OS, it has a history that’s largely independent of the classic Mac OS. Developed between 19 after Apple’s purchase of NeXT, Mac OS X brought an entirely new architecture based on NeXTSTEP, a Unix system, that eliminated many of the technical challenges that faced the classic Mac OS.It is the basis of Apple’s current system software for its other devices, iOS, watchOS, and tvOS. The current Mac operating system is macOS, originally named “Mac OS X” until 2012 and then “OS X” until 2016. The system, rebranded “Mac OS” in 1996, was preinstalled on every Macintosh until 2002 and offered on Macintosh clones for a short time in the 1990s. In 1984, Apple debuted the operating system that is now known as the “Classic” Mac OS with its release of the original Macintosh System Software. includes the graphical user interface-based operating systems it has designed for use with its Macintosh series of personal computers since 1984, as well as the related system software it once created for compatible third-party systems.

Mac OS (Macintosh Operating System) developed by Apple Inc.

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